Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2002-07-18
2004-06-29
Trost, William (Department: 2683)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S069000, C455S067110, C455S067130, C370S318000, C370S329000, C379S093010, C379S093080, C379S001030, C379S001040
Reexamination Certificate
active
06757549
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to analog cordless telephone systems and other various devices, such as intercoms, computers and televisions; and more particularly to devices that are configured to communicate via at least one of a plurality of available radio frequency channels at selective transmission power levels.
DESCRIPTION OF THE RELATED ART
Wireless communications devices such as conventional analog 9 MHz or 2.4 GHz region residential cordless telephone systems necessarily require the use of batteries. Typically, the battery in a handset of a cordless telephone system comprises a rechargeable battery that is recharged when the handset is inserted into an appropriate cradle on a base station. When handset batteries are not recharged with sufficient frequency, the handset batteries are drained to the point where handset operation fails.
SUMMARY OF THE INVENTION
A method and apparatus for adapting the transmission power of a wireless device in response to a determination that errors within a data message are above a threshold level. The data message is simultaneously transmitted with available audio information via a channel supporting audio and non-audio data in respective first and second spectral regions.
In a wireless communications system utilizing a plurality of communications channels, each channel having associated with it a respective carrier frequency for propagating audio data in a first spectral region and non-audio data in a second spectral region, a method according to an embodiment of the invention comprises receiving a data message from a wireless device via the second spectral region of a communications channel, the data message having associated with it a transmission power level; analyzing the data message to determine if the transmission power level is appropriate; and transmitting a data command to the wireless device via the second spectral region of the communications channel, the data command adapted to cause the wireless device to adjust the transmission power level.
REFERENCES:
patent: 6285886 (2001-09-01), Kamel et al.
patent: 6377813 (2002-04-01), Kansakoski et al.
Fried Harvey D.
Kolodka Joseph J.
Le Danh C
Thomson Licensing S.A.
Tripoli Joseph S.
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